I just got a (used) Channel Islands single fin 6'5"x20.5"x3", I have not tried it yet. I wanted to try a single shortboard since I wanted to try retro board I am really not into longboards yet have allways been intreagued by fins used in long boards (plus it looked so damn fun). It came with a 8.5" stock fin by Fins Unlimited, I think. Can anyone recomend placement and alternative fins to try? I am 6'4"x210 surfing 20 yrs at 34yrs old in Nor Cal SF-SC mainly and not really into "just cruising" I want to be able to snap and carve, single fin style of coarse. From other threads It sounds like True Ames norm flex 7-9", Rainbow TK flex 8.5" and Halycons fins (Rich) in Santa Cruz look very interesting. Plus has anyone tried the Rusty single fin on this type of board, it looks good I saw it on the Rainbow website. Any reply is appreciated. Thanks!!!